A 700lb or 900lb gorilla would be equally entitled to sleep wherever he wants to. Interestingly, the Wikipedia entry for Gorilla states that the average male gorilla weighs about 400lb, occasionally reaching 500lb in the wild. Only obese gorillas in captivity have attained weights of 600lb. So the number doesn't even seem to be related to gorilla biology (except that it is safely larger than any known gorilla, save King Kong).
Aid rentierism in Afghanistan has been a good contributor to economic growth and GDP per capita. Afghanistan managed to maintain an average of 12.4% growth rate between 2002 and 2013, while per capita income has increased over five-fold between 2002 and 2013.
When demand is inelastic, a decline in price of a good will decrease its revenue. Applying this test, a monopolist will fix the amount of his product at a level where the elasticity of his average revenue curve is greater than one (E > 1). It causes total revenue to increase. Here marginal revenue is positive.